/*
 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <auth_mod.h>
#include <bl_common.h>
#include <debug.h>
#include <desc_image_load.h>
#include <platform.h>
#include <platform_def.h>
#include <stdint.h>


/*******************************************************************************
 * This function loads SCP_BL2/BL3x images and returns the ep_info for
 * the next executable image.
 ******************************************************************************/
entry_point_info_t *bl2_load_images(void)
{
    bl_params_t *bl2_to_next_bl_params;
    bl_load_info_t *bl2_load_info;
    const bl_load_info_node_t *bl2_node_info;
    int plat_setup_done = 0;
    int err;

    /*
     * Get information about the images to load.
     */
    bl2_load_info = plat_get_bl_image_load_info();
    assert(bl2_load_info);
    assert(bl2_load_info->head);
    assert(bl2_load_info->h.type == PARAM_BL_LOAD_INFO);
    assert(bl2_load_info->h.version >= VERSION_2);
    bl2_node_info = bl2_load_info->head;

    while (bl2_node_info) {
        /*
         * Perform platform setup before loading the image,
         * if indicated in the image attributes AND if NOT
         * already done before.
         */
        if (bl2_node_info->image_info->h.attr & IMAGE_ATTRIB_PLAT_SETUP) {
            if (plat_setup_done) {
                WARN("BL2: Platform setup already done!!\n");
            } else {
                INFO("BL2: Doing platform setup\n");
                bl2_platform_setup();
                plat_setup_done = 1;
            }
        }

        if (!(bl2_node_info->image_info->h.attr & IMAGE_ATTRIB_SKIP_LOADING)) {
            INFO("BL2: Loading image id %d\n", bl2_node_info->image_id);
            err = load_auth_image(bl2_node_info->image_id,
                bl2_node_info->image_info);
            if (err) {
                ERROR("BL2: Failed to load image (%i)\n", err);
                plat_error_handler(err);
            }
        } else {
            INFO("BL2: Skip loading image id %d\n", bl2_node_info->image_id);
        }

        /* Allow platform to handle image information. */
        err = bl2_plat_handle_post_image_load(bl2_node_info->image_id);
        if (err) {
            ERROR("BL2: Failure in post image load handling (%i)\n", err);
            plat_error_handler(err);
        }

        /* Go to next image */
        bl2_node_info = bl2_node_info->next_load_info;
    }

    /*
     * Get information to pass to the next image.
     */
    bl2_to_next_bl_params = plat_get_next_bl_params();
    assert(bl2_to_next_bl_params);
    assert(bl2_to_next_bl_params->head);
    assert(bl2_to_next_bl_params->h.type == PARAM_BL_PARAMS);
    assert(bl2_to_next_bl_params->h.version >= VERSION_2);
    assert(bl2_to_next_bl_params->head->ep_info);

    /* Populate arg0 for the next BL image */
    bl2_to_next_bl_params->head->ep_info->args.arg0 = (u_register_t)bl2_to_next_bl_params;

    /* Flush the parameters to be passed to next image */
    plat_flush_next_bl_params();

    return bl2_to_next_bl_params->head->ep_info;
}
